What it is
Histidine is a naturally occurring amino acid that the skin uses as a building block and that also forms part of the skin's natural moisturizing factor. In cosmetics it conditions the skin, can help buffer a formula toward a comfortable pH, and offers some antioxidant support. In sunscreens it is typically a minor supporting ingredient that contributes to a gentle, skin-friendly profile.
Safety & warnings
Histidine is a naturally occurring amino acid considered gentle and generally well tolerated on skin, with a low expectation of irritation or sensitization. It is not considered comedogenic.
Origin & sourcing
It is an amino acid that occurs naturally in proteins and is generally produced for cosmetic use by fermentation.
Questions everyone asks
Why is histidine added to skin care?
As an amino acid that is part of skin's natural moisturizing factor, it conditions the skin and can help maintain a comfortable formula pH.
Is histidine natural?
It is a naturally occurring amino acid found in proteins and is commonly produced for cosmetics through fermentation.